Warranty 1 Year Voltage 14.8V Battery Type External Cells 4 Cell Cell Type Li-ion 18650 cell Battery Capacity 2200mAh Watt-Hour 30Wh Compatible with Dell Inspiron 14-3421 Series , Dell Inspiron 14 Series , Dell 14-3421 Series , Dell 14-3437 Series , Dell 14-5421 Series , Dell 14-N3421 Series , Dell 14-N5421 Series , Dell 14R Series , Dell 14R-3421 Series , Dell Inspiron 15 Series , Dell 15-3521 Series , Dell 15-3537 Series , Dell 15R-5521 Series , Dell 15R-5537 Series , Dell 15R-N3521 Series , Dell 15R-N5521 Series , Dell 15R-N5537 Series , Dell Inspiron 17 Series , Dell 17-3721 Series , Dell 17R Series , Dell 17R-5737 Series , Dell 17R-N3721 Series , Dell 17R-N3737 Series , Dell 17R-N5721 Series , Dell 17R-N5737 Series , Dell 3421 Series , Dell 3437 Series , Dell N5521 Series , Dell N5537 Series , Dell N5721 Series , Dell N5737 Series , Dell Latitude 14 3000 Series , Dell Latitude 15 3000 Series , Dell Latitude 3440 Series , Dell Latitude 3540 Series , Dell Latitude E3440 Series , Dell Latitude E3540 Series , Dell Vostro 2421 Series , Dell Vostro 2521 Series